name "_ENV" configurable through 'luaconf.h'

lapi.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 2.134 2010/08/04 18:40:28 roberto Exp roberto $
+** $Id: lapi.c,v 2.135 2010/09/03 14:14:01 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -891,7 +891,7 @@ LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data,
       /* get global table from registry */
       Table *reg = hvalue(&G(L)->l_registry);
       const TValue *gt = luaH_getint(reg, LUA_RIDX_GLOBALS);
-      /* set global table as 1st upvalue of 'f' (may be _ENV) */
+      /* set global table as 1st upvalue of 'f' (may be LUA_ENV) */
       setobj(L, f->l.upvals[0]->v, gt);
       luaC_barrier(L, f->l.upvals[0], gt);
     }

lbaselib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.247 2010/08/23 18:03:11 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.248 2010/09/03 14:14:01 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -336,7 +336,7 @@ static int luaB_loadin (lua_State *L) {
     const char *name;
     lua_pushvalue(L, 1);  /* environment for loaded function */
     name = lua_setupvalue(L, -2, 1);
-    if (name == NULL || strcmp(name, "_ENV") != 0)
+    if (name == NULL || strcmp(name, LUA_ENV) != 0)
       luaL_error(L, "loaded chunk does not have environment upvalue");
   }
   return n;

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 2.71 2010/06/16 13:44:36 roberto Exp roberto $
+** $Id: ldebug.c,v 2.72 2010/06/21 16:30:12 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -315,7 +315,7 @@ static const char *getobjname (lua_State *L, CallInfo *ci, int reg,
                            ? luaF_getlocalname(p, t + 1, pc)
                            : getstr(p->upvalues[t].name);
           kname(p, k, a, what, name);
-          what = (vn && strcmp(vn, "_ENV") == 0) ? "global" : "field";
+          what = (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
         }
         break;
       }

llex.c

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.36 2010/04/05 16:35:37 roberto Exp roberto $
+** $Id: llex.c,v 2.37 2010/04/16 12:31:07 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -161,7 +161,7 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
   ls->linenumber = 1;
   ls->lastline = 1;
   ls->source = source;
-  ls->envn = luaS_new(L, "_ENV");  /* create env name */
+  ls->envn = luaS_new(L, LUA_ENV);  /* create env name */
   luaS_fix(ls->envn);  /* never collect this name */
   luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
   next(ls);  /* read first char */

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.89 2010/07/28 15:51:59 roberto Exp roberto $
+** $Id: loadlib.c,v 1.90 2010/08/02 17:14:48 roberto Exp roberto $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -496,7 +496,7 @@ static int ll_require (lua_State *L) {
 #if defined(LUA_COMPAT_MODULE)
 
 /*
-** changes the _ENV variable of calling function
+** changes the environment variable of calling function
 */
 static void set_env (lua_State *L) {
   lua_Debug ar;

lparser.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.90 2010/07/07 16:27:29 roberto Exp roberto $
+** $Id: lparser.c,v 2.91 2010/08/23 17:32:34 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -289,7 +289,7 @@ static void singlevar (LexState *ls, expdesc *var) {
   FuncState *fs = ls->fs;
   if (singlevaraux(fs, varname, var, 1) == VVOID) {  /* global name? */
     expdesc key;
-    singlevaraux(fs, ls->envn, var, 1);  /* get _ENV variable */
+    singlevaraux(fs, ls->envn, var, 1);  /* get environment variable */
     lua_assert(var->k == VLOCAL || var->k == VUPVAL);
     codestring(ls, &key, varname);  /* key is variable name */
     luaK_indexed(fs, var, &key);  /* env[varname] */
@@ -433,14 +433,14 @@ static void close_func (LexState *ls) {
 
 /*
 ** opens the main function, which is a regular vararg function with an
-** upvalue named '_ENV'
+** upvalue named LUA_ENV
 */
 static void open_mainfunc (LexState *ls, FuncState *fs) {
   expdesc v;
   open_func(ls, fs);
   fs->f->is_vararg = 1;  /* main function is always vararg */
   init_exp(&v, VLOCAL, 0);
-  newupvalue(fs, ls->envn, &v);  /* create '_ENV' upvalue */
+  newupvalue(fs, ls->envn, &v);  /* create environment upvalue */
 }
 
 

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.141 2010/07/25 15:02:41 roberto Exp roberto $
+** $Id: luaconf.h,v 1.142 2010/07/28 15:51:59 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -115,6 +115,14 @@
 #endif
 
 
+/*
+@@ LUA_ENV is the name of the variable that holds the current
+@@ environment, used to access global names.
+** CHANGE it if you do not like this name.
+*/
+#define LUA_ENV		"_ENV"
+
+
 /*
 @@ LUA_API is a mark for all core API functions.
 @@ LUALIB_API is a mark for all auxiliary library functions.